Hook adapter for bolts



Feb. 6, 1940. H. LINDSAY HOOK ADAPTER FOR BOLTS Filed Sept. 6, 1938 Patented Febrfi, 1940 I I v t j UNITED" STATES PATENT cries HOOK ADAPTER FOR BOLTS A Henry Lindsay, Bradford, England, assignor to Henry Lindsay Limited, Bradford, England Application September c, 1938, Serial No. 228,697 In Great Britain April 30, 1938 2 Claims; (01. 189-35) This invention relates to adapters'for convertit may be readily filed or cut away so that the ing ordinary standard or straight bolts into hook flange 6 of the joist may be more securely held bolts, said adapters being of the kind-comprising by the adapter 3. 1

a thick metal washer having a rectangular hole It will be seen that when the hook adapter 5 to take bolts with round'or square necks and is appliedthe clampfi is disposed to one side of being formed on one side with a laterally prothe flange 6 so that the abutment t overlaps the jecting abutment equivalent to the hook portion 7 flangeand the web or flllet 5 bears firmly against of a forged hook bolt. i j the inclined edge of the flange, irrespective of With this construction, when an adapter is the thickness of the flange, and that the spur i 10 being used to clamp'on to flanges of joists with contacts with the bolt, thus providing positive 10 the bolt lying parallel with the base or back of means for securing the hook adapter to the j the flange, it has been found that there is apt flange and for preventing the development of to be slackness between the bolt and the flat surslack between the bolt 5 and the flange. face of the base or back of flange due to the I claim: I 3 hook portion of the adapter not necessarily being A 1. In combination with a member having a a close fit upon the edge of the joist flange. In flange, a hook adapter arranged to be secured to order to overcome this disadvantage it is necesthe edge of said flange, said adapter including a sary to supply a size of hook adapter to fit exclamp having an Opening a j ce t e ase o actly the flange for which it is intended and the flange, a bolt disposed substantially parallel I consequently in order to cover an extensive range to the base of the flange and extending through gg of flanges large numbers of hook adapters must said opening for securing the clamp to the flange, be supplied, and the chief object of this invensaid adapter having a lateral projecting abuttion is to provide a hook adapter which will be ment on one side overlapping said fiange and a suitable for a large range of flanges. spur on the side opposite to said abutment en- According to the invention the laterally progaging said bolt, and said abutment having a 25 jecting abutment of the adapter is provided with medially disposed web projecting from the una webor fillet adapted to bear against the edge derside thereof, said web extending substantially of the flange upon which the adapter is used, p pe cu ar to t e edge of the flange so as to the web or fillet being such that the adapter can bear against the same when the parts are apbe used for a wide range of flange thicknesses. p e d Web being t y P Of the o k go 50 against the bolt I. If desired, said fillet orweb In order that the invention may be clearly adapter bearing against theflange; understood and readily carried into effect, the 2, In Co n w a member having a same will now be more fully described with r'efflange provided with an inclined edge, a hook erence to and by theaid of the accompanying adapter arranged to be secured to the edge of drawing, whereinsaid flange, said adapter including aclamp hav- 35 Figure 1 is a side elevation of an adapter conng n Ope g ac the e o e fl n e, structed according to the invention. a bolt disposed substantially parallel to the base Figure 2 is aninverted plan of Figure 1. of the flange and extending through said open- Referring to the drawing, a bolt I having a ing for securing th cl mp to h fl n sai hexagonal head 2 is passed through an adapter adapter having a lateral projecting abutment or clamp 3 which is formed with a depending on one side overlapping said flange and a spur hook portion 4. Said hook portion 4 is provided on the side opposite'to said abutment engaging with a fillet or web 5 on its underside which is said bolt, and said abutment having. an inclined adapted to engage the flange 6 of a joist or the Web projecting from the underside thereof arlike. The fillet or web 5 is so formed that varyranged to be r a t h edge f the fl n o 45 ing sizes of flanges 6 may be held by it, as ininsure a tight fit oi the clamp with the flange, dicated by the dotted lines in Figure l. A deirrespective of the thickness of the latter, when pending spur 1 is formed opposite to the hook the parts are set up, said web being the only part portion or abutment 4 and is adapted to bear of the hook adapter bearing against the flange.

5 may be made of such asize and material that HENRY LINDSAY. 

